Open vascular system is absent in

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(D) An open circulatory system is characteristic of most arthropods and mollusks,where blood flows into open spaces called sinuses or hemocoel.$A$,$B$

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Earthworm

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(D) An open circulatory system is characteristic of most arthropods and mollusks,where blood flows into open spaces called sinuses or hemocoel.$A$,$B$,and $C$ (House fly,Cockroach,and Silver Fish) are all arthropods and possess an open circulatory system.$D$ (Earthworm) belongs to the phylum Annelida,which possesses a closed circulatory system where blood is confined within blood vessels.

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